Press Sauté function on instant pot*. Once hot, add ghee. Salt the outside of the chuck roast then place in the basin of the instant pot and sear chuck roasts on all sides, about 5-7 minutes per side.
Once chuck roast is completely seared, remove and set aside. Press keep warm/cancel on instant pot. Place all veggies in the instant pot. Use a knife to cut 5 small holes in the chuck roast and press the garlic cloves into each hole. Place the chuck roast on top of the veggies.
Secure lid, close off pressure valve then press manual to high pressure and press the up button until the time hits 90 minutes. Once time is up, quick release to let the pressure out then remove lid.
Remove chuck roast from instant pot, cut twine and use two forks to shred the meat. Strain vegetables from liquid and add the meat to the vegetables. Before serving, pour some of the liquid from the instant pot over meat. Garnish with freshly chopped parsley.